package com.tanhua.dubbo.api;

import cn.hutool.core.collection.CollUtil;
import com.tanhua.dubbo.utils.IdWorker;
import com.tanhua.dubbo.utils.TimeLineService;
import com.tanhua.model.mongo.Movement;
import com.tanhua.model.mongo.MovementTimeLine;
import com.tanhua.model.vo.PageResult;
import org.apache.dubbo.config.annotation.DubboService;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.AggregationResults;
import org.springframework.data.mongodb.core.aggregation.TypedAggregation;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;

import java.util.List;

@DubboService
public class MovementApiImpl implements MovementApi {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Autowired
    private IdWorker idWorker;

    @Autowired
    private TimeLineService timeLineService;
//    发布动态
    @Override
    public void publish(Movement movement) {
        try {
//        1、保存动态详情
            movement.setPid(idWorker.getNextId("movement"));//设置pid
            movement.setCreated(System.currentTimeMillis());//设置时间
            movement.setId(ObjectId.get());//设置id（可自动生成）
            mongoTemplate.save(movement);
/*//        2、查询当前用户的好友数据
            Criteria criteria=Criteria.where("userId").is(movement.getUserId());
            Query query=Query.query(criteria);
            List<Friend> friends = mongoTemplate.find(query, Friend.class);
//        3、循环好友数据，构建时间线数据存入数据库
            for (Friend friend : friends) {
                MovementTimeLine movementTimeLine = new MovementTimeLine();
                movementTimeLine.setMovementId(movement.getId());
                movementTimeLine.setUserId(friend.getUserId());
                movementTimeLine.setFriendId(friend.getFriendId());
                movementTimeLine.setFriendId(System.currentTimeMillis());
                mongoTemplate.save(mongoTemplate);
            }*/
            timeLineService.saveTimeLine(movement.getUserId(),movement.getId());

        } catch (Exception e) {
            //忽略事务
            e.printStackTrace();
        }
    }

    //查询个人动态
    @Override
    public PageResult findByUserId(Long userId, Integer page, Integer pagesize) {
        Criteria criteria=Criteria.where("userId").is(userId);
        Query query=Query.query(criteria).skip((page-1)*pagesize).limit(pagesize)
                .with(Sort.by(Sort.Order.desc("created")));
        List<Movement> movements = mongoTemplate.find(query, Movement.class);
        long count = mongoTemplate.count(query, Movement.class);
        return new PageResult(page,pagesize,count,movements);
    }

    //查询好友动态
    @Override
    public List<Movement> findFriendMovements(Integer page, Integer pagesize, Long friendId) {
//        1、根据friendId查询时间线表
        Criteria criteria=Criteria.where("friendId").is(friendId);
        Query query=Query.query(criteria)
                .skip((page-1)*pagesize).limit(pagesize).with(Sort.by(Sort.Order.desc("created")));
        List<MovementTimeLine> movementTimeLines = mongoTemplate.find(query, MovementTimeLine.class);
//        2、提取动态id列表
        List<ObjectId> list = CollUtil.getFieldValues(movementTimeLines, "movementId", ObjectId.class);
//        3、根据动态id查询动态详情
        Query movementQuery=Query.query(Criteria.where("id").in(list));
        return mongoTemplate.find(movementQuery,Movement.class);
    }

    //随机获取多条数据
    @Override
    public List<Movement> randomMovements(Integer counts) {
//        1、创建统计对象，设置统计参数
        TypedAggregation aggregation = Aggregation.newAggregation(Movement.class, Aggregation.sample(counts));
//        2、调用方法统计
        AggregationResults<Movement> movements = mongoTemplate.aggregate(aggregation,Movement.class);
//        3、返回结果
        return movements.getMappedResults();
    }

    //根据pid数组查询动态
    @Override
    public List<Movement> findMovementsByPids(List<Long> pids) {
        Query query=Query.query(Criteria.where("pid").in(pids));
        return mongoTemplate.find(query,Movement.class);
    }

    //查询单条动态
    @Override
    public Movement findById(String movementId) {
        return mongoTemplate.findById(movementId,Movement.class);
    }
}